This gem is called ascii_paradise.
AsciiParadise is an umbrella project that allows us to gather
ascii-related code, in Ruby.
The main focus for this project is to incorporate animated
ASCII components, but the project will also store some
non-animated ASCII - thus, essentially making it an umbrella
project for (useful) ASCII content. The main focus will
remain on animated ASCII, though.
Presently, 113
ASCII components are registered in this project.
For more information about this project, have a look
at the documentation of this gem's homepage.